HT12M

2

Block Diagram

Pin Assignment

Rev. 1.00

1

March 25, 2002

Features

General Description

The main application area for the HT12M device is for

remote control doorbells working together with HT12E.

Containing all the functions of the Holtek HT12D de-

coder and with an added amplifier and melody genera-

tor, the device eliminates the need for customers to

incorporate an external op-amp and melody generator

IC within their product applications, in the process sig-

nificantly reducing overall product costs.

In addition to being fully compatible with the HT12D cir-

cuitry, the device includes the following features; inter-

nal Inverting AMP with can also operate as standard

independent inverter, internal 2 channel tone generator

and current type Audio output.

O S C I

A M P

V D D

V S S

B U S Y

A U D

O s c i l l a t o r

C i r c u i t

A M P

C i r c u i t

D I N

D i v i d e r

C o m p a r a t o r

T o n e

G e n e r a t o r

C o n t r o l

C i i r c u i t

A d d r e s s

C i r c u i t

A 0

A 7

T E S T

1 6

1 5

1 4

1 3

1 2

1 1

1 0

9

1

2

3

4

5

6

7

8

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

V D D

T E S T

V T

O S C I

A M P

D I N

A U D

V S S

H T 1 2 M

1 6 D I P - A